31 week uterine height abdominal circumference standard

Prenatal check-ups are something that many expectant mothers will go through many times during pregnancy. Because there is a fetus in their body, pregnant mothers will be extremely worried about their physical health, fearing that once they get sick, it will affect the growth of the fetus. Regularly measuring abdominal circumference and uterine height can determine whether the fetus is growing slowly. So what are the standard values ​​of uterine height and abdominal circumference at 31 weeks of pregnancy? Let’s take a look together below.

Abdominal circumference should be measured starting from the 16th week of pregnancy. The method is: the pregnant mother takes an upright position, undresses to completely expose the abdomen, and uses the navel as the reference point. Wrap a tape measure horizontally around the abdomen. The measured value is the abdominal circumference. The average abdominal circumference increases by 0.8 cm per week. The fastest growth is during the 20th to 24th week of pregnancy, at 1.6 cm per week; during the 24th to 36th week of pregnancy, it grows 0.8 cm per week; after the 36th week of pregnancy, the growth rate of abdominal circumference slows down, at 0.3 cm per week. Taking the abdominal circumference at 16 weeks of pregnancy as the base number, the average increase in abdominal circumference at full term is 21 cm. Expectant mothers get confused when their abdominal circumference does not increase according to the numerical value. In reality, the growth of abdominal circumference cannot be exactly the same.

At the 12th week of pregnancy, the height of the fundus of the uterus is about 2 to 3 horizontal fingers above the pubic symphysis, and by the fifth month of pregnancy it will reach 1 horizontal finger below the navel. Pregnant mothers can feel the position of the fundus of the uterus by themselves, and the uterine height is about 18 cm at this time.

From 16 to 36 weeks of pregnancy, the uterine height increases by 0.8 to 1.0 cm per week, with an average of 0.9 cm. At the end of 24 weeks, it is 1 horizontal finger above the belly button, and at the end of 28 weeks, it is 3 horizontal fingers above the belly button.

At 31 weeks of pregnancy, the normal uterine height should be 25~31.5 cm, and the normal abdominal circumference should be 84~95 cm.

A low uterine height value often indicates intrauterine growth retardation or malformation of the fetus; a high uterine height value indicates multiple births, fetal malformation, macrosomia, breech presentation, high floating fetal head, polyhydramnios, placenta previa, etc.

Symptoms and precautions of 31 weeks of pregnancy:

1. At 31 weeks of pregnancy, the fetus grows in size and the space available for movement in the uterus becomes less and less, so pregnant mothers will find that the intensity of fetal movement is much weaker than in the previous weeks. However, at this time, you still need to count fetal movements patiently in order to detect fetal abnormalities in time. It is recommended to read how to count fetal movements.

2. In addition to supplementing adequate nutrition, pregnant women at 31 weeks of pregnancy also need to learn to control their weight. The weight gain of pregnant women should not exceed 500 grams per week, otherwise it may lead to fetal overnutrition or even macrosomia.

3. Sexual intercourse is strictly prohibited during the 31st week of pregnancy to avoid premature birth and infection.

4. Many pregnant women will experience leg cramps in the late stages of pregnancy, which is mainly caused by calcium deficiency and requires appropriate calcium supplementation.

5. Pregnant women in the late stages of pregnancy should make sure to go to the hospital for prenatal check-ups on time, which is very important for the health of the pregnant woman and the fetus.

6. It is very inconvenient for pregnant women to move around during the 31st week of pregnancy. It is best not to travel far to avoid unnecessary trouble.

7. Pregnant women may feel tired and physically and mentally exhausted in the late stages of pregnancy. At this time, they should try to adjust their mentality. A positive and happy mood is very beneficial to the development of the fetus, while pessimism will have a certain impact on the fetus.

When a pregnant woman reaches the 31st week of pregnancy, the baby has grown a lot. At this time, the uterine height and abdominal circumference can also reflect the baby's condition. For example, if the uterine height is low, it indicates that the fetus is developing slowly or is deformed. If the uterine height is high, it may also indicate problems such as polyhydramnios and macrosomia. However, because each mother's situation is different, it is difficult to conclude that the baby has a problem based on one or two values. Mothers do not need to worry too much.